Improvement in fire-alarm-telegraph apparatus



ROGERS. :PIRE ALARM 'TBLEGRAPH' APPARATUS.

No; 104,357. Patented June i4, 1870 UNITED STATES PATENT OFM-cn,

EDWIN Roenes, onBosToN, :MA,s'siionusnTTS.

lMPROVEMNTiN FIRE-*ALARM-TELEGRAPH APPARATUS.

Specilicaton forming parl' oi"Lett`ers` l?aient No. 104,357, dated .Tune14,1870.

To all 'whom 'it may concern;

`ne it. known that I, EDWIN noenns, of nos; toi, in the county ofSuffolk and State of Massachu'setts, have invented anlmprovement inFire-Alarm-TelegraphlApparatus; and I do hereby declare that thefollowing, taken in connection with the drawingffwhich accompaniesandformspartof this"specification,y isa description of my inventionsufficient to en able those skilled in the art to practice it.

`The invention 'relates to the arrangement of fire-,alarm-telegraphmechanism in that class of apparatus in which all the bells of thesystem are automatically struck from any signah box, iu'contradistinction to giving au alarm` from any box to a central oftice,from lwhich office all thebells'of the system are struck.

In my invention the severalcircuits are so Connected that when eithercircuit is broken every other circuit isrst broken andthenclosedbyymechanical means, (and not merely by action of the 'electric fluidand magnets,)

` the circuit breaking and closing instrument of each circuit beingoperatedby a weight, sp1-in g,

or. other positively-acting mechanism.

My invention consists,'priniarily, in com.- bining with each circuitotthe system a circuit breaking and closingmechanism operated `by thestress of a weight, spring, or other mei chanical device. f

The drawing represents the wires of a sysv tcm composed of two circuitsconnected by instruments in accordance with my improvement.

A shows the wires and instruments in plan.

B is a side elevation of them.

a, denotes the armature of an electric coil, b, of one instrument, anda2 the armature of a similar coil, h2, of the other instrument, the

armature a being on the end of one arm of a lever, d, pivoted at c,whose other arm, f, cx-

tends back through and to the front side of a frame, g, as seen at B.From this arm f project two pins, h Ii, the pin t being` belowand on oneside of the other., h, and the two being at such distance apart and soarranged as to allow a linger, Ic, on an arm, l', `to slip iirst by oneof them, and then, when the lever vis moved,

` t by the other. This arm lis fixed to one end of a rotary shaft, fm,carrying a circuit breaking and closiu g wheel ,ory drum, n, ,thiswheel,

vbeing an insulated wheel carrying on one portion-of its periphery ametal plate, o, which, when 4brought under the ends oftwo springs, p p,connected respectively with two wires, q r, of one circuit, closes suchcircuit, whichpasses through the instrument 1, and connects with t thecoil b2 of the other instrument, the coil b otthe rst instrument beingconnected by wires 'q2 #of the second circuit with the secondinstrument.

The shaft of the wheel a carries a pinion, t', meshing into and drivenby a gear, t,on a

shaft, u, carrying a drum, upon which is wound a cord having vsuspended-to .it a weight, the stressof which `tends-to rotate the yshaft a andthe shaft of the circuit-closing-wheel geared thereto.' The circuit isnormally closed, the. armature being drawn to its magnet, and thelever-arm f being-raised, asseen at B; In' `this normal position of themechanism the lin# ger k of the arm l is.l thrown forward against thepin 13 of the armature-leverf. Now, if the circuit be broken, (releasingthe armature from the attraction of the magnet,) the arm f of thel,lever will bedrawn down by a spring, c, carryin g the vpin below thepath of rotationof the finger il', thereby releasing lthe arm l,andallowing the circuit-wheel n to rotate by the stress of the weight.As the wheel rotates, the

plate o passes from beneath the springs p p,

and disconnects the wires q r, and breaks the current of which they forma part. The mailicircuit wires of the instrument 1 are shown at q if,connecting through the screw-cups y2 with the two poles of the battery.

' The secondinstrument is precisely like the first, and like all the'others of the alarm, (if

composed of more than two circuits.) a de- 'notes the armature; b2, thecoil; d2, the arma.-

ture-levemfz, the long arm thereof; h2 t2, the two stop-pins k2, thefinger arrested thereby; l2, the fin gercarrying arm on a shaft of acircuit-wheel, n2, connecting 'and' disconnecting springs p2 p2,,connecting the main-circuit wires (12W with the rst instrument. The twocircuits thus joined by the instruments (and the other circuitssimilarly joined, if there be more than two) .are normally closed, eachfinger la or k2 being arrested by the pin' i or i? in advance of it.Now, if the circuit of the iirst instru ment be broken, the armature (tbeing released disconnecting such lWires q2 r2,llead1ngstl1crerem. Asthese wires lead to the other instrument, 2. through the disconnection:attire tcircriit-wheel breaks the cncu'itof thesecondtins'trnment,cansingtlle release of thennmaturefffanl the relca-sefof thecircuit-wheel :2mn from iitsrstop-pin fnf the a-r` mame-leven@ :thatthe'..eireiiit-wheelm2` turns, bythe stressiothe Weight);and moves fitsplate :from under the :spr'in gsgzpgthus breaking the circuit "of the:second instamment, .and lso on through any' mn-rnber of circuitsanjd'instru-v ments which -lbe enf-braced ,in-111e system. The :firstciwuit having th-ns been broken, fits .circuit-Wheel rotates until fthe:arm l -`comesrouml to :the pins again, :and is stoppedlby its linger l;.striking the rst (.if 'the circuit remained breken) and kns itapproaches the pins its plate n afgains moves under andconnects thesprings@ p, thereby closing nheeircuit of the next instrument, and the'weight belonging to each instrument similarly operates itscircuit-wheel, again connecting thesprin gs thereof, thus resumingeachcrcnt -rc-tsenorf mal or closed condition, each finger kzslippimgpast the pinh when the armature is lrawnflto the magnet, and bringing upagainsthe next pin z', as before described. Thus, tliongh :one circuitmay remain broken, every. other circuit will be closed, or thecontinuity lnfallthe rest of system will be established.

0n the sha-ft of each circuit-wheel .is any composed of two blades, w w,rotationof which insures a uniform'rota-ry movement either/ircut-wheel,and to modify such movement apply each blade. w to its arm Tby za pin,n, which .permits the inclination ot' the-blader() be varied andadjusted so as to presentgreater 0r less resisting-surface, the blail'eretaining its position by friction.

A I elaim- 1n combination.iv ith several' chien-its cohvergin gat onepoint, circuit breaking and clos 1`ing wheels, or equivalent devices,one foreach circuit, operated by weights, springs, @requir- .a-lentmechanism to break each cirert from the one first broken, and tomechanieally'close each circuit, though the one rst broken may remainopen.

EExecuted December 22, 1869.

. EDWIN Roenes.

Witnesses ,FRANCIS GOULD, GY.' CRANE.'

